usaf1965

I have a 2003 O3 Convertable GT . When I brake , my emergency brake light turns on till I let off the brakes.

Z28KLR

Check fluid level in the master cylinder reservoir, it's probably low.

And then before jumping to any conclusions and just simply topping it off with fluid, ask yourself "why is it low?" In your quest to answer that question, start pulling wheels off and check brake pad wear. Good chance you're damn near out of pad somewhere.

As pads wear, the calipers hold more fluid because the piston becomes extended out of it's bore in the caliper. Directly resulting in lower fluid levels in the reservoir. If you simply top off the reservoir and go on with your life, next time you install new brake pads (which will probably be sooner than later) and go to compress the piston back in to accommodate the new pads the reservoir will overflow and make a nice mess. So that's why I suggest checking to see if pads need to be replaced.

usaf1965

The white reservoir right?. It's full, but there's black in the top of the reservoir

Z28KLR

Black what on the top? Sludge/fluid?

Camster

Black film on top of the fluid? Black cap?
Anyway,I hope that you didn't blow your limited budget on non essentials like new wheels or shorter springs..This car sounds like one that has something go bad weekly.

usaf1965

The brakes work fine. The light just pops up. And it's like dried up liquid sitting in the top of the reservoir

Camster

Perhaps whatever it is,is clogging the low fluid sensor.
I've never heard of a foreign substance floating on top of reservoir brake fluid.

Z28KLR

Agree with the above, that sludge stuff is probably screwing with the sensor. I would scoop that stuff out, get a turkey baster or better yet a hand pump and suck all of the fluid out of the reservoir and replace with fresh fluid. And then perform a flush on the entire system.

I've seen brake fluid come out dark green and that's not very good, but to have some sort of solidified gellatanous crap sitting in the top of the reservoir says very bad things about how the braking system on your car was maintained prior to you owning it. I would flush it all out and start over asap, in that condition the fluid can become corrosive and before you know it you'll be replacing more expensive things.

After performing the above, if the light still doesn't go out then I guess we'll go from there. But I can guarantee you will notice an improvement in braking and pedal firmness with the new fluid.

usaf1965

I just began to notice when I get up to a fast speed quickly, the light turns on but I'm not on the brake and it's not slowing down. Even when I'm on the gas sometimes it will pop up